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Top : Buick Resource : VIN & Engine Info : Grand Sport Vin number Breakdown :
1966 to 1977 GS Vin info

1st Digit - 4 = Buick Motor Division

2nd and 3rd Digits - 34 = 67 GS340, 68-70 GS350, 71 GS

46 = 66 GS, 67-69 GS400, 70 GS455

4th and 5th Digits - 07 = 2-door sedan

17 = 2 door coupe

27 = 2 door sedan

37 = 2 door coupe

67 = 2 door convertible

6th Digit - Corresponds with model year (ex. 5=1965, 7=1967)

7th Digit - B = Baltimore, MD

C = South Gate, MI

D = Atlanta, GA

G = Framingham, MA

H = Flint, MI

I = Oshawa, Ontario

K = Kansas City, MO

V = Bloomfield, IL

Y = Wilmington, DE

Z = Fremont CA

Last 6 Digits - Production number sequence



ENGINE CODES - Found on the passenger side of the lifter valley support rail

63 - JT = 401 ci, 4 bbl, 325 horse

JW = 425 ci, 4 bbl, 340 horse

JX = 425 ci, 2x4 bbl, 360 horse

64 - KT = 401 ci, 4 bbl, 325 horse

KW = 425 ci, 4 bbl, 340 horse

KX = 425 ci, 2x4 bbl, 360 horse

65' - LT = 401 ci, 4 bbl, 325 horse

LW = 425 ci, 4 bbl, 340 horse

LX = 425 ci, 2x4 bbl, 360 horse

66' - 34, MT = 401 ci, 4 bbl (Carter AFB), 325 horse

- MR = 401 ci, 4 bbl (Rochester), 332 horse - 11:1 with 425 cam but with same piston/chambers as other 401's


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